Cost: Free. Just like the first Camp, registration to Mashup Camp 6 is free. Also free is the food (breakfast and lunch) as well as the entertainment.

Who: As you can see on the initial Who's Coming list it's a diverse group including mashup developers (independent and enterprise), analysts, VCs, tool providers, and the people actually building the APIs at places like Google, Yahoo, Facebook and Microsoft.

How and What: Follows an unconference format that allows the attendees to define the agenda and lead the discussions which results in a high signal-to-noise ratio. Discussion topics range from the technical to business strategy (see the first Camp wiki for examples). The first two days are the Mashup University and the second two are the unconference. Raymond Yee, a lecturer at University of California Berkeley and author of Pro Web 2.0 Mashups, will teach the Introduction to Mashups class.